Thanks, Moe.
Vertical lines would show up on the printed page. Removing the cartridge, toner would be on the drum. Replacing the cartridge solved the problem. Just had the problem and found what appeared to be a small piece of paper 1/8"x1/8") adhered to the drum. After removing the paper (with cotton), a 1/8" "fuzzy" line, with a vertical line at the edge, printed out. Examining the drum revealed a similar deposiut of toner on the drum.
Just a guess that the drum may be damaged in such an event.
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